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datetime: allow GstDateTime where not all fields are set
In order to deserialise and re-serialise dates and date times from tags properly, we need to be able to express partial dates (e.g. YYYY or YYYY-MM) and date times. We only support partial date times where all the more significant fields above the first unset field are set (e.g. YYYY-00-DD is not supported). Calling _get_foo() when foo is not set is not allowed any more, callers need to check which fields are set first. https://bugzilla.gnome.org/show_bug.cgi?id=677757
This commit is contained in:
Oleksij Rempel
Tim-Philipp Müller
parent
d916018021
commit
000ebef2f4
2 changed files with 363 additions and 7 deletions
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@ -49,10 +49,22 @@
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#define GST_DATE_TIME_USEC_PER_SECOND (G_GINT64_CONSTANT (1000000))
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#define GST_DATE_TIME_USEC_PER_MILLISECOND (G_GINT64_CONSTANT (1000))
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typedef enum
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{
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BAD_DATE,
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HAS_Y, /* has year */
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HAS_YM, /* has year and month */
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HAS_YMD, /* has year mont and day */
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HAS_YMD_H,
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HAS_YMD_HM,
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HAS_YMD_HMS
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} DateTimeFields;
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struct _GstDateTime
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{
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GDateTime *datetime;
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DateTimeFields fields;
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volatile gint ref_count;
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};
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@ -70,11 +82,96 @@ gst_date_time_new_from_gdatetime (GDateTime * dt)
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return gst_dt;
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}
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/**
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* gst_date_time_has_year:
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* @datetime: a #GstDateTime
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*
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* Returns the TRUE if year exist
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*
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* Since:
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*/
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gboolean
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gst_date_time_has_year (const GstDateTime * datetime)
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{
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return (datetime->fields >= HAS_Y) ? 1 : 0;
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}
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/**
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* gst_date_time_has_month:
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* @datetime: a #GstDateTime
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*
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* Returns the TRUE if month exist
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*
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* Since:
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*/
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gboolean
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gst_date_time_has_month (const GstDateTime * datetime)
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{
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return (datetime->fields >= HAS_YM) ? 1 : 0;
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}
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/**
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* gst_date_time_has_day:
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* @datetime: a #GstDateTime
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*
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* Returns the TRUE if day exist
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*
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* Since:
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*/
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gboolean
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gst_date_time_has_day (const GstDateTime * datetime)
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{
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return (datetime->fields >= HAS_YMD) ? 1 : 0;
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}
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/**
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* gst_date_time_has_hour:
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* @datetime: a #GstDateTime
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*
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* Returns the TRUE if hour exist
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*
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* Since:
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*/
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gboolean
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gst_date_time_has_hour (const GstDateTime * datetime)
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{
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return (datetime->fields >= HAS_YMD_H) ? 1 : 0;
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}
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/**
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* gst_date_time_has_minute:
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* @datetime: a #GstDateTime
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*
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* Returns the TRUE if minute exist
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*
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* Since:
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*/
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gboolean
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gst_date_time_has_minute (const GstDateTime * datetime)
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{
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return (datetime->fields >= HAS_YMD_HM) ? 1 : 0;
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}
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/**
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* gst_date_time_has_second:
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* @datetime: a #GstDateTime
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*
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* Returns the TRUE if second exist
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*
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* Since:
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*/
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gboolean
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gst_date_time_has_second (const GstDateTime * datetime)
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{
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return (datetime->fields >= HAS_YMD_HMS) ? 1 : 0;
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}
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/**
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* gst_date_time_get_year:
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* @datetime: a #GstDateTime
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*
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* Returns the year of this #GstDateTime
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* Call gst_date_time_has_year before, to avoid warnings.
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*
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* Return value: The year of this #GstDateTime
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* Since: 0.10.31
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@ -82,6 +179,7 @@ gst_date_time_new_from_gdatetime (GDateTime * dt)
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gint
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gst_date_time_get_year (const GstDateTime * datetime)
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{
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g_return_val_if_fail (gst_date_time_has_year (datetime), 0);
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return g_date_time_get_year (datetime->datetime);
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}
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@ -90,6 +188,7 @@ gst_date_time_get_year (const GstDateTime * datetime)
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* @datetime: a #GstDateTime
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*
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* Returns the month of this #GstDateTime. January is 1, February is 2, etc..
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* Call gst_date_time_has_month before, to avoid warnings.
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*
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* Return value: The month of this #GstDateTime
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* Since: 0.10.31
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@ -97,6 +196,7 @@ gst_date_time_get_year (const GstDateTime * datetime)
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gint
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gst_date_time_get_month (const GstDateTime * datetime)
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{
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g_return_val_if_fail (gst_date_time_has_month (datetime), 0);
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return g_date_time_get_month (datetime->datetime);
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}
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@ -105,6 +205,7 @@ gst_date_time_get_month (const GstDateTime * datetime)
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* @datetime: a #GstDateTime
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*
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* Returns the day of this #GstDateTime.
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* Call gst_date_time_has_day before, to avoid warnings.
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*
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* Return value: The day of this #GstDateTime
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* Since: 0.10.31
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@ -112,6 +213,7 @@ gst_date_time_get_month (const GstDateTime * datetime)
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gint
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gst_date_time_get_day (const GstDateTime * datetime)
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{
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g_return_val_if_fail (gst_date_time_has_day (datetime), 0);
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return g_date_time_get_day_of_month (datetime->datetime);
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}
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@ -121,6 +223,7 @@ gst_date_time_get_day (const GstDateTime * datetime)
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*
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* Retrieves the hour of the day represented by @datetime in the gregorian
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* calendar. The return is in the range of 0 to 23.
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* Call gst_date_time_has_haur before, to avoid warnings.
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*
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* Return value: the hour of the day
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*
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@ -129,6 +232,7 @@ gst_date_time_get_day (const GstDateTime * datetime)
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gint
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gst_date_time_get_hour (const GstDateTime * datetime)
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{
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g_return_val_if_fail (gst_date_time_has_hour (datetime), 0);
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return g_date_time_get_hour (datetime->datetime);
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}
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@ -138,6 +242,7 @@ gst_date_time_get_hour (const GstDateTime * datetime)
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*
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* Retrieves the minute of the hour represented by @datetime in the gregorian
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* calendar.
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* Call gst_date_time_has_minute before, to avoid warnings.
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*
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* Return value: the minute of the hour
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*
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@ -146,6 +251,7 @@ gst_date_time_get_hour (const GstDateTime * datetime)
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gint
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gst_date_time_get_minute (const GstDateTime * datetime)
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{
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g_return_val_if_fail (gst_date_time_has_minute (datetime), 0);
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return g_date_time_get_minute (datetime->datetime);
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}
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@ -155,6 +261,7 @@ gst_date_time_get_minute (const GstDateTime * datetime)
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*
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* Retrieves the second of the minute represented by @datetime in the gregorian
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* calendar.
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* Call gst_date_time_has_second before, to avoid warnings.
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*
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* Return value: the second represented by @datetime
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*
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@ -163,6 +270,7 @@ gst_date_time_get_minute (const GstDateTime * datetime)
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gint
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gst_date_time_get_second (const GstDateTime * datetime)
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{
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g_return_val_if_fail (gst_date_time_has_second (datetime), 0);
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return g_date_time_get_second (datetime->datetime);
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}
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@ -202,6 +310,158 @@ gst_date_time_get_time_zone_offset (const GstDateTime * datetime)
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G_USEC_PER_SEC) / 3600.0;
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}
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/**
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* gst_date_time_new_y:
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* @year: the gregorian year
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*
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* Creates a new #GstDateTime using the date and times in the gregorian calendar
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* in the local timezone.
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*
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* @year should be from 1 to 9999.
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*
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* Free-function: gst_date_time_unref
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*
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* Return value: (transfer full): the newly created #GstDateTime
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*
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* Since:
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*/
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GstDateTime *
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gst_date_time_new_y (gint year)
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{
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GstDateTime *datetime;
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datetime = gst_date_time_new_local_time (year, 1, 1, 1, 1, 1);
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datetime->fields = HAS_Y;
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return datetime;
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}
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/**
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* gst_date_time_new_ym:
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* @year: the gregorian year
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* @month: the gregorian month
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*
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* Creates a new #GstDateTime using the date and times in the gregorian calendar
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* in the local timezone.
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*
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* @year should be from 1 to 9999, @month should be from 1 to 12.
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*
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* If value is -1 then all over value will be ignored. For example
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* if @month == -1, then #GstDateTime will created only for @year.
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*
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* Free-function: gst_date_time_unref
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*
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* Return value: (transfer full): the newly created #GstDateTime
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*
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* Since:
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*/
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GstDateTime *
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gst_date_time_new_ym (gint year, gint month)
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{
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GstDateTime *datetime;
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datetime = gst_date_time_new_local_time (year, month, 1, 1, 1, 1);
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datetime->fields = HAS_YM;
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return datetime;
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}
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/**
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* gst_date_time_new_ymd:
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* @year: the gregorian year
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* @month: the gregorian month
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* @day: the day of the gregorian month
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*
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* Creates a new #GstDateTime using the date and times in the gregorian calendar
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* in the local timezone.
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*
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* @year should be from 1 to 9999, @month should be from 1 to 12, @day from
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* 1 to 31.
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*
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* If value is -1 then all over value will be ignored. For example
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* if @month == -1, then #GstDateTime will created only for @year. If
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* @day == -1, then #GstDateTime will created for @year and @month and
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* so on.
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*
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* Free-function: gst_date_time_unref
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*
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* Return value: (transfer full): the newly created #GstDateTime
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*
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* Since:
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*/
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GstDateTime *
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gst_date_time_new_ymd (gint year, gint month, gint day)
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{
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GstDateTime *datetime;
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datetime = gst_date_time_new_local_time (year, month, day, 1, 1, 1);
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datetime->fields = HAS_YMD;
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return datetime;
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}
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/**
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* gst_date_time_new_ymd_h:
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* @year: the gregorian year
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* @month: the gregorian month
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* @day: the day of the gregorian month
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* @hour: the hour of the day
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*
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* Creates a new #GstDateTime using the date and times in the gregorian calendar
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* in the local timezone.
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*
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* @year should be from 1 to 9999, @month should be from 1 to 12, @day from
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* 1 to 31, @hour from 0 to 23.
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*
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* If value is -1 then all over value will be ignored. For example
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* if @month == -1, then #GstDateTime will created only for @year. If
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* @day == -1, then #GstDateTime will created for @year and @month and
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* so on.
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*
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* Free-function: gst_date_time_unref
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*
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* Return value: (transfer full): the newly created #GstDateTime
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*
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* Since:
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*/
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GstDateTime *
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gst_date_time_new_ymd_h (gint year, gint month, gint day, gint hour)
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{
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GstDateTime *datetime;
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datetime = gst_date_time_new_local_time (year, month, day, hour, 1, 1);
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datetime->fields = HAS_YMD_H;
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return datetime;
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}
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/**
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* gst_date_time_new_ymd_hm:
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* @year: the gregorian year
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* @month: the gregorian month
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* @day: the day of the gregorian month
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* @hour: the hour of the day
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* @minute: the minute of the hour
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*
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* Creates a new #GstDateTime using the date and times in the gregorian calendar
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* in the local timezone.
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*
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* @year should be from 1 to 9999, @month should be from 1 to 12, @day from
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* 1 to 31, @hour from 0 to 23, @minutes from 0 to 59.
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*
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* If value is -1 then all over value will be ignored. For example
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* if @month == -1, then #GstDateTime will created only for @year. If
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* @day == -1, then #GstDateTime will created for @year and @month and
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* so on.
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*
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* Free-function: gst_date_time_unref
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*
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* Return value: (transfer full): the newly created #GstDateTime
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*
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* Since:
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*/
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GstDateTime *
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gst_date_time_new_ymd_hm (gint year, gint month, gint day, gint hour,
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gint minute)
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{
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GstDateTime *datetime;
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datetime = gst_date_time_new_local_time (year, month, day, hour, minute, 1);
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datetime->fields = HAS_YMD_HM;
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return datetime;
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}
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/**
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* gst_date_time_new_from_unix_epoch_local_time:
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* @secs: seconds from the Unix epoch
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@ -218,8 +478,11 @@ gst_date_time_get_time_zone_offset (const GstDateTime * datetime)
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GstDateTime *
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gst_date_time_new_from_unix_epoch_local_time (gint64 secs)
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{
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return
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GstDateTime *datetime;
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datetime =
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gst_date_time_new_from_gdatetime (g_date_time_new_from_unix_local (secs));
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datetime->fields = HAS_YMD_HMS;
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return datetime;
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}
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/**
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@ -238,8 +501,34 @@ gst_date_time_new_from_unix_epoch_local_time (gint64 secs)
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GstDateTime *
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gst_date_time_new_from_unix_epoch_utc (gint64 secs)
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{
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return
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GstDateTime *datetime;
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datetime =
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gst_date_time_new_from_gdatetime (g_date_time_new_from_unix_utc (secs));
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datetime->fields = HAS_YMD_HMS;
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return datetime;
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}
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static DateTimeFields
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gst_date_time_check_fields (gint * year, gint * month, gint * day,
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gint * hour, gint * minute, gdouble * seconds)
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{
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if (*month == -1) {
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*month = *day = *hour = *minute = *seconds = 1;
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return HAS_Y;
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} else if (*day == -1) {
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*day = *hour = *minute = *seconds = 1;
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return HAS_YM;
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} else if (*hour == -1) {
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*hour = *minute = *seconds = 1;
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return HAS_YMD;
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} else if (*minute == -1) {
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*minute = *seconds = 1;
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return HAS_YMD_H;
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} else if (*seconds == -1) {
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*seconds = 1;
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return HAS_YMD_HM;
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} else
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return HAS_YMD_HMS;
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}
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/**
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@ -257,6 +546,11 @@ gst_date_time_new_from_unix_epoch_utc (gint64 secs)
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* @year should be from 1 to 9999, @month should be from 1 to 12, @day from
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* 1 to 31, @hour from 0 to 23, @minutes and @seconds from 0 to 59.
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*
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* If value is -1 then all over value will be ignored. For example
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* if @month == -1, then #GstDateTime will created only for @year. If
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* @day == -1, then #GstDateTime will created for @year and @month and
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* so on.
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*
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* Free-function: gst_date_time_unref
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*
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* Return value: (transfer full): the newly created #GstDateTime
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@ -267,8 +561,24 @@ GstDateTime *
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gst_date_time_new_local_time (gint year, gint month, gint day, gint hour,
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gint minute, gdouble seconds)
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{
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return gst_date_time_new_from_gdatetime (g_date_time_new_local (year, month,
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day, hour, minute, seconds));
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GstDateTime *datetime;
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DateTimeFields fields;
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g_return_val_if_fail (year > 0 && year <= 9999, NULL);
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g_return_val_if_fail ((month > 0 && month <= 12) || month == -1, NULL);
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g_return_val_if_fail ((day > 0 && day <= 31) || day == -1, NULL);
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g_return_val_if_fail ((hour >= 0 && hour < 24) || hour == -1, NULL);
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g_return_val_if_fail ((minute >= 0 && minute < 60) || minute == -1, NULL);
|
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g_return_val_if_fail ((seconds >= 0 && seconds < 60) || seconds == -1, NULL);
|
||||
|
||||
fields = gst_date_time_check_fields (&year, &month, &day,
|
||||
&hour, &minute, &seconds);
|
||||
|
||||
datetime = gst_date_time_new_from_gdatetime (g_date_time_new_local (year,
|
||||
month, day, hour, minute, seconds));
|
||||
|
||||
datetime->fields = fields;
|
||||
return datetime;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -286,7 +596,11 @@ gst_date_time_new_local_time (gint year, gint month, gint day, gint hour,
|
|||
GstDateTime *
|
||||
gst_date_time_new_now_local_time (void)
|
||||
{
|
||||
return gst_date_time_new_from_gdatetime (g_date_time_new_now_local ());
|
||||
GstDateTime *datetime;
|
||||
|
||||
datetime = gst_date_time_new_from_gdatetime (g_date_time_new_now_local ());
|
||||
datetime->fields = HAS_YMD_HMS;
|
||||
return datetime;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -305,7 +619,11 @@ gst_date_time_new_now_local_time (void)
|
|||
GstDateTime *
|
||||
gst_date_time_new_now_utc (void)
|
||||
{
|
||||
return gst_date_time_new_from_gdatetime (g_date_time_new_now_utc ());
|
||||
GstDateTime *datetime;
|
||||
|
||||
datetime = gst_date_time_new_from_gdatetime (g_date_time_new_now_utc ());
|
||||
datetime->fields = HAS_YMD_HMS;
|
||||
return datetime;
|
||||
}
|
||||
|
||||
gint
|
||||
|
|
@ -336,6 +654,11 @@ priv_gst_date_time_compare (gconstpointer dt1, gconstpointer dt2)
|
|||
* some fractional timezones, while it still keeps the readability of
|
||||
* represeting it in hours for most timezones.
|
||||
*
|
||||
* If value is -1 then all over value will be ignored. For example
|
||||
* if @month == -1, then #GstDateTime will created only for @year. If
|
||||
* @day == -1, then #GstDateTime will created for @year and @month and
|
||||
* so on.
|
||||
*
|
||||
* Free-function: gst_date_time_unref
|
||||
*
|
||||
* Return value: (transfer full): the newly created #GstDateTime
|
||||
|
|
@ -349,7 +672,17 @@ gst_date_time_new (gfloat tzoffset, gint year, gint month, gint day, gint hour,
|
|||
gchar buf[6];
|
||||
GTimeZone *tz;
|
||||
GDateTime *dt;
|
||||
GstDateTime *datetime;
|
||||
gint tzhour, tzminute;
|
||||
DateTimeFields fields;
|
||||
|
||||
g_return_val_if_fail (year > 0 && year <= 9999, NULL);
|
||||
g_return_val_if_fail ((month > 0 && month <= 12) || month == -1, NULL);
|
||||
g_return_val_if_fail ((day > 0 && day <= 31) || day == -1, NULL);
|
||||
g_return_val_if_fail ((hour >= 0 && hour < 24) || hour == -1, NULL);
|
||||
g_return_val_if_fail ((minute >= 0 && minute < 60) || minute == -1, NULL);
|
||||
g_return_val_if_fail ((seconds >= 0 && seconds < 60) || seconds == -1, NULL);
|
||||
g_return_val_if_fail (tzoffset >= -12.0 && tzoffset <= 12.0, NULL);
|
||||
|
||||
tzhour = (gint) ABS (tzoffset);
|
||||
tzminute = (gint) ((ABS (tzoffset) - tzhour) * 60);
|
||||
|
|
@ -359,9 +692,16 @@ gst_date_time_new (gfloat tzoffset, gint year, gint month, gint day, gint hour,
|
|||
|
||||
tz = g_time_zone_new (buf);
|
||||
|
||||
fields = gst_date_time_check_fields (&year, &month, &day,
|
||||
&hour, &minute, &seconds);
|
||||
|
||||
dt = g_date_time_new (tz, year, month, day, hour, minute, seconds);
|
||||
g_time_zone_unref (tz);
|
||||
return gst_date_time_new_from_gdatetime (dt);
|
||||
|
||||
datetime = gst_date_time_new_from_gdatetime (dt);
|
||||
datetime->fields = fields;
|
||||
|
||||
return datetime;
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
|
|||
|
|
@ -36,6 +36,13 @@ G_BEGIN_DECLS
|
|||
*/
|
||||
typedef struct _GstDateTime GstDateTime;
|
||||
|
||||
gboolean gst_date_time_has_year (const GstDateTime * datetime);
|
||||
gboolean gst_date_time_has_month (const GstDateTime * datetime);
|
||||
gboolean gst_date_time_has_day (const GstDateTime * datetime);
|
||||
gboolean gst_date_time_has_hour (const GstDateTime * datetime);
|
||||
gboolean gst_date_time_has_minute (const GstDateTime * datetime);
|
||||
gboolean gst_date_time_has_second (const GstDateTime * datetime);
|
||||
|
||||
gint gst_date_time_get_year (const GstDateTime * datetime);
|
||||
gint gst_date_time_get_month (const GstDateTime * datetime);
|
||||
gint gst_date_time_get_day (const GstDateTime * datetime);
|
||||
|
|
@ -51,6 +58,15 @@ GstDateTime * gst_date_time_new_local_time (gint year, gint month,
|
|||
gint day, gint hour,
|
||||
gint minute,
|
||||
gdouble seconds) G_GNUC_MALLOC;
|
||||
GstDateTime * gst_date_time_new_y (gint year) G_GNUC_MALLOC;
|
||||
GstDateTime * gst_date_time_new_ym (gint year, gint month) G_GNUC_MALLOC;
|
||||
GstDateTime * gst_date_time_new_ymd (gint year, gint month,
|
||||
gint day) G_GNUC_MALLOC;
|
||||
GstDateTime * gst_date_time_new_ymd_h (gint year, gint month,
|
||||
gint day, gint hour) G_GNUC_MALLOC;
|
||||
GstDateTime * gst_date_time_new_ymd_hm (gint year, gint month,
|
||||
gint day, gint hour,
|
||||
gint minute) G_GNUC_MALLOC;
|
||||
GstDateTime * gst_date_time_new (gfloat tzoffset,
|
||||
gint year, gint month,
|
||||
gint day, gint hour,
|
||||
|
|
|
|||
Loading…
Reference in a new issue